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makaylahunt
06.05.2020 •
Mathematics
The table shows the number of minutes per day students spend outside of school reading and doing their math homework.
Number of minutes reading
15, 15, 15, 20, 30, 30, 30, 30, 45, 60
Number of minutes doing math homework
25, 30, 30, 30, 30, 40, 45, 45, 55, 60
What is the difference of the means as a multiple of the approximate mean absolute deviations?
Enter the correct answer in the box.
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Ответ:
on the other side.
I'll use your equation to demonstrate. Please watch closely:
6x = 5x + 7
Subtract 5x from each side: x = 7 .
Oops. Ran out of steps. That's all this one needs.
' 7 ' is the 'solution' to this equation. That means: ' 7 ' is the number
that 'x' must be in order for the equation to be a true statement.
If 'x' is any other number but 7, the equation makes a statement
that's false.
Example: What if we make 'x' ten ? Then the equation says
6 (10) = 5 (10) + 7
60 = 50 + 7
60 = 57 HONK ! Not true ! 'x' can only be ' 7 ' .